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Brando
 
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Blow off valve

I need a blow off valve. I have efi. I want one that sounds cool. I'm confused with all the offerings. I'd like guidance but don't feel I should pay porsche prices just because I have a Porsche. What should I get if there is a preference and why? Leaning toward tial but dang.
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Turbo powa!
1977 911s. it's cool
Old 10-09-2017, 06:36 PM
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turbo smart makes very good ones. i got two of them for my motor along with two waste gates. same or better quality than a tial and a fraction of the cost.
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88 turbo Guards red Targa slant nose, and yes I am a horsepower junkie, 3.4liter,7.5 to 1 JE pistons, Adjustable WUR, Imagine fuel head, 1 bar waste gate headers,allthe cis toys. Now apart to become the next EFI monster. fabbing my own intake, headers Individual throttle bodies, MS-3, pauter rods, Xtreme twin plugged heads, gt-2 evo cams cop's.
05 Cayenne S lapis blue

Last edited by Ken911; 10-09-2017 at 07:16 PM..
Old 10-09-2017, 06:43 PM
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Tial. Forge.
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- 86 Porsche 930 - Mr.Hyde
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Old 10-09-2017, 06:58 PM
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Brando
 
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50mm?
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Turbo powa!
1977 911s. it's cool
Old 10-09-2017, 07:06 PM
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Canadian newbie
 
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Can an old, stock 930 sport a BOV like the cool cats?


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1987 930 Guards Red
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Old 10-09-2017, 07:20 PM
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Brando
 
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Stock 930 needs a diverter valve. Your car has an old school overly complicated type.
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Turbo powa!
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Old 10-09-2017, 07:41 PM
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3 restos WIP = psycho
 
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Fabspeed bypass pipe and a Forge


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- 1965 911
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Old 10-09-2017, 08:29 PM
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So you're saying it can be done?


1987 930 Guards Red
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Old 10-10-2017, 02:48 AM
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I have Forge diverters on my wagon. Very nice build quality and just the right amount of noise.
Old 10-10-2017, 04:02 AM
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I have a TurboSmart RacePort v2, 50mm...haven't heard it yet as I'm still finalizing things but it's nice and compact and they make a version to fit the TIAL flange if you have that configuration already. IMO, the TIAL 50mm is slow and excessively bulky. The RacePort v2 dropped 46% of the mass from their v1 version and it fits well in tight spaces like a 911 engine compartment.

This is the valve, albeit on a 2JZ, but with a very similarly sized turbo to the one I am using:

https://youtu.be/1p2O_Qz7jNs
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1976 911S Signature Edition - 3.2SSt (JE 98mm 9.5:1 pistons, 964 Cams, ARP Rod Bolts, Big Port SC Heads, 3.2 Carrera Manifold, ID725's, B&B Headers, TS HyperGate45 Gen V, TS RacePort, BW S360, AEM Infinity 506, E85)
IG: Signature_911

Last edited by '76 911S 3.0; 10-10-2017 at 02:54 PM..
Old 10-10-2017, 02:49 PM
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Crotchety Old Bastard
 
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Quote:
Can an old, stock 930 sport a BOV like the cool cats?
Yes this is not an uncommon mod. A couple of ways to do it, swap out to a long neck intercooler or fab an adapter for the short neck. The 930 BOV is replaced by the much smaller 965 style BOV and plumbing. You can use whatever small type aftermarket BOV you like at that point.
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'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
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Old 10-11-2017, 03:36 AM
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Quote:
Originally Posted by RarlyL8 View Post
Yes this is not an uncommon mod. A couple of ways to do it, swap out to a long neck intercooler or fab an adapter for the short neck. The 930 BOV is replaced by the much smaller 965 style BOV and plumbing. You can use whatever small type aftermarket BOV you like at that point.


Well, I'm planning to keep my intercooler the way it is. Can you fab me up one with the bov? Looking for simple plug and play I can install myself out of the box. I'm still getting tons of compliments for your exhaust !


1987 930 Guards Red
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Old 10-11-2017, 06:47 AM
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I have an old HKS from the '90's on mine. 1.5" port.

Works just fine. Doesn't that have that ricer sound, thankfully.
Old 10-11-2017, 08:26 AM
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Quote:
Originally Posted by RarlyL8 View Post
...fab an adapter for the short neck. The 930 BOV is replaced by the much smaller 965 style BOV and plumbing...
'zactly what I've got...
Old 10-11-2017, 09:11 AM
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Brando
 
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Quote:
Originally Posted by Tippy View Post
I have an old HKS from the '90's on mine. 1.5" port.

Works just fine. Doesn't that have that ricer sound, thankfully.
I like the yellowbird blow off sound.
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Turbo powa!
1977 911s. it's cool
Old 10-11-2017, 09:20 AM
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Brando
 
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2:10 and 2:16
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Turbo powa!
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Old 10-11-2017, 09:52 AM
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^^^ That high pitched whine would drive me bonkers.
I like the air release noise of the other one better.
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Derrick
Old 10-11-2017, 10:38 AM
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I don't want to hear the BOV at all.
Old 10-11-2017, 11:05 AM
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Regardless if you want the sound or not, venting to atmosphere will enhance the flamethrower effect !
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88 930 3.4 ,Twin plugged billet Xtreme cylinder heads and denso COPs, Dougherty custom GT 2 evo cams,pauter rods,Garrett Gt40,ms3x Efi ,1100cc injectors,extrude honed 3.2 intake,TK billet fullbay I/C,MODE headers,KEP stage 2,E-85 706 rwhp
Old 10-11-2017, 12:11 PM
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Brando
 
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I've been in a 930 with the pshhh sound and I agree it could get old.
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Turbo powa!
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Old 10-11-2017, 01:10 PM
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